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concentric layers (envelopes) formed by the earth’s matter. Proceeding inward from the periphery to the center of the earth are the atmosphere, hydrosphere, crust, silicate hard mantle (upper and lower), and core with metallic properties (divided into a liquid outer core and an apparently solid central core, or subcore.

The region inhabited by organisms—including the lower part of the atmosphere, the entire hydrosphere, and the upper part of the earth’s crust—is called the biosphere.

References in periodicals archive ?
Increased interior porosity under the carapace is an essential feature of the dichotomy of the dual outer geospheres.
Hydride reactions at the transition between inner and outer geospheres are primarily molecular hydride reactions with water.
The proposed triple geospheres theory of the Earth is a dichotomy, a core of unknown "ultimetal," a middle geosphere (underworld) of intermetals, energy-rich hydrides, and an outer geosphere or carapace of energy-poor oxides.
The only known contrast between thee two inner geospheres is simple density, whereas the contrast between the outer two geospheres clearly involves latent energy content as well as density.
Thusly, hydride dissociation and oxidation above a steadily degassing inner geosphere originated the lithosphere and continue to maintain it.
The low silicon density would give it a differential buoyancy among metals; and the ability to form both hydrides and oxides would make it a chemical arbiter between the reduced interior geosphere dominated by the Earth's most abundant element, hydrogen, and the exterior geosphere dominated by the second most abundant element, oxygen.
A key to when the outer geosphere developed is given in the evolution of living cells.
The relationship with GeoSphere will start as a beta test of The Copernus Decisioning Service, which should be complete in late 2000.
click of the mouse, GeoSphere users will be able to share
assist GeoSphere in building the value chain reliability tools
GeoSphere couples strong process operability understanding with leading edge technology to develop CSM solutions for their partners in the chemical and petroleum processing industries.
GeoSphere is currently evaluating the development of a CSM portal as well as an extensive training component to enhance its CSM offering.

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